Loom shuttle



A rifi 21, 1936.

D. 8. SMITH LOOM SHUTTLE Filed Jan. 21, 1955 d amrne r Patented Apr. 21, 1936 UNITED. STATES PATENT OFFICE 2,037,829 LOOM SHUTTLE Daniel S. Smith, Wilkinsonville, Mass.

Application January 21, 1935, Serial No. 2,629

5 Claims.

This invention relates to shuttles for use in fly shuttle looms and of the type in which a pivoted spindle supports-a weft-carrying bobbin or cop. Such a spindle must be accurately aligned with 5 the shuttle eye and this alignment must be maintained during loom operation if breakage of weft is to be prevented.

It is the general object of my invention to pro vide improved means for vertically adjusting a 10 spindle in a loom shuttle and for maintaining the spindle in alignment with the shuttle eye.

A further object of the invention is to combine my improved aligning and positioning means with means to prevent longitudinal displacement of a 5 bobbin on the spindle while the loom is running.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

20 Preferred forms of the invention are shown in the drawing, in which I Fig. 1 is a partial sectional side elevation of a spindle embodying my improvements;

Fig. 2 is a plan view of my improved adjusting 25 and clamping device;

Fig. 3 is a partial plan view of the clamping element;

Fig. 4 is a side elevation of the adjusting ele- (ment; a Y

30 Fig. 5 is a partial sectional side elevation of a shuttle embodying a second form of my invention;

Fig. 6 is a plan view of the adjusting and clamping device shown in Fig. 5;

35 Fig. '7 is a partial'plan view of the clamping element shown in Fig. 6, and

Fig. 8 is a side elevation of the adjusting element shown in Fig. '6.

Referring to Figs. 1 to 4,1 have shown a shuttle 4.0 S having a spindle I pivoted therein on a cross pin I I. The spindle I0 has an enlarged-head portion comprising a V-shaped projection I2 and a downwardly offset portion I3 having a shoulder I4. The spindle I i] is'mounted to swing in a suit- 45 able recess in the-shuttle S, and the V-shaped portion I 2 engages a rub iron or button I mounted in the end of a coil spring 16.

A supplementary recess I! is provided for the spring I6, and the button I 5 is forced by the 50 spring I6 into yielding engagement with the portion I2 of the spindle I0, thus holding the spindle firmly from displacement when in either its raised or lowered. position.

My improved positioning and clamping device 55 is clearly shown in Figs; 2, 3, and 4, and comprises a clamping element 20 and a positioning element 2!.

The clamping element 20 has a corrugated portion 24 to engage the butt of a bobbin having a plurality of rings thereon. The element 20 also 5 has a hole 25 (Fig. 3) to receive the rivet 22, and a rectangular recess 26 to provide clearance for an offset portion 28 (Fig. 4) of the positioning element 2|.

The element 2I has a hole. 29 for the rivet 22 and has an upwardly projected end portion 30 threaded to receive an adjustable stop screw 3I. The offset portion 28 and end portion 3|] are preferably slotted as indicated at 32 (Fig. 2), so that the parts may be forced toward each other to provide a tight friction fit on the stop screw 3I.

A tail-piece 33 is welded or otherwise secured to the element 2! and hasan upwardly projecting end portion 34 which provides an abutment for the free end of the spring H, as shown in Fig. 1'.

In the manufacture of my improved device, the elements 20 and 2| are preferably formed separately and are then secured permanently together, as by the rivet 22, with the recess 26 providing clearance for the ofiset portion 28 of the element 2I.

The shuttle S is grooved to snugly receive the side portions 35 of the element 20. and the combined positioning and clamping device is held 0 firmly in position by the outward pressure of the spring I6 against the end projection 34.

When the spindle is in operative position, the shoulder I4 engages the head of the adjustable stop screw 3|, which provides a substantially rigid abutment therefor. The screw 3| may be easily adjusted by swinging the spindle I0 to raised position and then inserting a screw-driver in the slot shown in the outer end of the screw 3 I.

When the spindle is in lowered position, the spring-pressed button I5 engages the point of the V-shaped projection I2 on the spindle head substantially above the center of the pivot stud Hand thus forces the spindle downward and causes the shoulder I4 to firmly engage the end of the screw 3|.

When the spindle is raised, the button I5 engages the inclined upper face of the spindle head and holds the spindle yieldingly in raised position, with the under side of the projection I2 engaging the upper side of the element 2 I. When the spindle is swung downward with a ring-type bobbin thereon, the grooved portion 24 of the clamping element 20 receives the rings on the and a positioning element 5|.

bobbin and prevents axial displacement thereof during the running of the loom.

I have thus provided a simple but rigid and substantial device which accurately aligns and positions the spindle, while at the same time providing a clamp for the butt of the bobbin and a bearing support for the outer end of the spring l6.

It is to be noted that the spring l6 acts both to yieldingly hold the spindle II] in raised or lowered position but also to prevent displacement of the clamping and positioning device.

In Figs. 5 to 8 inclusive I have shown a modified form of my invention applied to a slightly different type of pivoted spindle and as used with a different type of bobbin.

In Figs. 5 to 8 I have shown a shuttle S having a spindle 40 on which a weft carrier or bobbin B is mounted. The spindle 46 is provided with an enlarged head 4| having an end portion 42 in which a downwardly open slot .3 is formed. The slot 43 hooks over a crosspin 44 in the shuttle S and thus pivotally supports the spindle 40, while at the same time permitting its removal without removal of the pin 44.

The head 42 also has an inclined upper surface 45 engaged by a leaf spring 45 mounted in a recess 41 in the upper part of the spindle S and held in position by a screw 48 and nut 49. The leaf spring 46 is upwardly bowed, and the tension thereof may be adjusted by tightening the screw 48.

The clamping and positioning device shown in Figs. 6, '7, and 8 is similar to that previously described, and comprises a clamping element 50 The clamping element 50 has an upwardly projecting end portion 52, concavely recessed to engage the bobbin B in front of a flange 54 thereon, whereby axial displacement of the bobbin is prevented. The clamping element 50 also has a hole 55 to receive a rivet 56 and a rectangular clearance recess 51 as in the previous form.

The positioning element 5| has a hole 60 t receive the rivet 56, a hole 61 to receive the screw 48, and a slotted offset portion 62 terminating in an upwardly projecting end portion 63 threaded to receive an adjustable stop screw 64 as in the previous form.

The head 4| of the spindle 40 has a downwardly projecting portion 66 (Fig. 5) providing a shoulder 61 to engage the slotted outer end of the adjustable stop screw 64 when the spindle is in lowered or operative position.

The clamping and positioning device is inserted in suitable slots formed in the shuttle S and is held in position by the screw 48 which also retains the spring 46. The operation and advantages of this form of my invention are similar to that of the form previously described.

It will be understood that the shape of the end portion of the clamping device with either form of my invention is made to correspond to the particular type of bobbins being used. Accordingly the device 20 may be formed with the upwardly projecting end portion shown in Fig. 6,

or the device 50 may be formed with the corrugated end portion shown at 24 in Fig. 2.

An important advantage of my improvement arises from the provision of the adjustable stop screw 3| or 64 in a member which is firmly retained in fixed position in the shuttle and which has no operative movement relative tothe shuttle or to any other part.

An important feature of both forms of my invention is the provision of a stop which engages a rear surface of the spindle head with a forward thrust longitudinal of the shuttle, in which direction the shuttle is strongest. This construction also permits decrease in depth of shuttle below the axis of the spindle.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a loom shuttle, a pivoted spindle, a spring effective to yieldingly maintain said spindle in operative or inoperative position, and a combined bobbin-clamping and spindle-positioning device secured in said shuttle and having an adjustable stop screw mounted therein, said de vice having a tail-piece engaged by the outer end of said spring, whereby said device is held from longitudinal displacement.

2. In a loom shuttle, a pivoted spindle, a spring effective to yieldingly maintain said spindle in operative or inoperative position, and a combined bobbin-clamping and spindle-positioning device secured in said shuttle, said device comprising a recessed clamping element, an offset and upturned positioning element threaded to receive an adjustable stop screw, and means to secure said elements in fixed relation, the offset portion of said positioning element being received in the recess of said clamping element.

3. In a loom shuttle, a pivoted spindle, a spring effective to yieldingly maintain said spindle in operative or inoperative position, a combined bobbin-clamping and spindle-positioning device secured in said shuttle and having an adjustable stop screw mounted therein, and a single screw effective to hold and adjust the tension of said spring and also to secure said device in said shuttle.

4. In a loom shuttle, a pivoted spindle, a spring effective to yieldingly maintain said spindle in operative or inoperative position, a bobbin clamping device secured in said shuttle, and having an upwardly offset portion with a threaded opening therein, and a stop screw adjustably threaded in said opening and effective to engage and vertically position said spindle.

5. In a loom shuttle, a pivoted spindle, a spring effective to yieldingly maintain said spindle in operative or inoperative position, a bobbin clamping device secured in said shuttle, and a stop screw adjustably mounted in said device and effective to engage and Vertically position said. spindle, said bobbin clamping device having a portion engaged by said spring and retained from longitudinal displacement thereby.

DANIEL S. SMITH. 

